it is likely the biggest night of the campaign so far. the president gets the first question in a loosely- structured format. weeks of prep are coming down to this with a lot on the line for both candidates. we are live in denver to talk about some of the key talking points tonight. what can we expect to hear? >> we can expect to hear a lot about the economy. half of this debate is dedicated to that issue alone. and also expect other domestic issues, including health care as the role of government. what is unclear is what we will hear about controversies, everything from mitt romney's 47% comment to the video that surfaced just last night about the president talking about race and hurricane katrina. >> going into this debate, what to the numbers look like? >> president obama has an eight- point lead in the battleground state of ohio. he is up, but he is in a statistical dead heat in other critical states like florida and virginia. we will see if tonight moves those numbers. >> month after month after month, both have been campaigning. how